John taggaet



UNITED STATES PATENT Ori-ICEc JOHN TAGGART, OE ROXBURY, MASSACHUSETTS, ASSIGNOR TO I. TAGGART AND I. S.' SHALER.

FLUID-METER.

Specificationforming part of Letters Patent No. 12,887, dated May 1.5-, 1855.

To @ZZ whom it may concern.-

Be it known that I, JOHN TAGeARnofRoxbury, in the county of Norfolk and State of Massachusetts, Ahave invented a new or Improved Automatic' Fluid-Meter; and I do hereby declare that the same is fully described and represented in the following specification and the accompanying drawings, letters, figures, and references thereof.

Of the said drawings, Figure 1 represents a front elevation of my improved meter. Fig. 2 is a side view of it. Fig. 3 is a central, vertical, and longitudinal section of it taken in a plane parallel to its front face. Fig. 4 is a transverse section of it.

In the construction of my improved iiuidmeterI form its case A so as to contain two chambers, a b, which are made to open into each other by means of a neck or passage, o, the chamber a being placed above the chamber b, as represented in the drawings. The upper chamber, a,is of aeylindrieal form,while the lower chamber may be said to approximate to the form of a sector of a cylinder, its bottom or lower part being made or curved as seen at d. The superior chamber d is provided with an induction pipe or opening, e, which is placed in the upper part of it,as seen in the drawings. The lower chamber has two eduction-valve chambers, f g, which freely communicate with the said chamber b and are cylindrical in shape and have inserted inthem, respectively, two faucet-valves, M,that are provided with eduction-passages la Z, leading out of the valve-chambers. Each faucetvalve is made to turn within its valve-chamber and to have a journahm, extended through the front side of the ease A and having attached to it a crank-arm, as seen at u o, the two crank-arms of said journals being connected by a rod, p, jointed to both of them in such manner as to cause corresponding movements of both valves when either one is moved. Each valve is provided with an arm, g r, that extends from'it into the chamber b.

Within the chamber b, and resting on its bottom and made to extend up through its passage or neck c and into the chamber a, is what may be termed a rectangularvibrating7 plate, dasher, or piston, D, whose thickness where it passes through the neck is made somewhat less than. or about one -third of the Width of the neck, and whose width corresponds to the distance between the two side plates, 1- s, of the case A. If desirable, packing may be introduced between the upright edges of the plate or dasher D and the said sides of the case A, such packing being conlined to the dasher and so as to move with it and make close joints between the dasherand the sides of the case.

In order to relieve the valve arms from the effect of a sudden percussion when the dasher D is moved against either of them,such dasher may be provided with springs applied to opposite sides of it, as seen at s t, and so as to be alternately borne in contact with the arms during thevibratory movements of dasherm piston. Under these circumstances if water under pressure be allowed to enter the case A through the induction-pipe thereof it will fiow into the chamber aand pressthedasher against one side of the neck e; and if we suppose such side of the neck to be the rightside of it and the eduction-valve on the left of the dasher is closed and that on the right of it open, the water will ll that space in the chambers c and b which is the left of the dasher or its spring, and by its pressure will move the dasher toward the eduction-valve on the right of .it until the-dasher is forcedinto contact with the arm of such eduction-valve and closes said valve, and at the same time forces open the other eduction-valve. Ihe moment this takes place the pressure of the water in the chamber a will cause the dasher to be moved from the right tothe left side of the neck c, which taking place the water will be stopped from passing from the chamber a to the cham- -ber b on the left of the dasher, but will be free spring is forced in contact With the arm of the left eduction-valve and closes said valve and causes the right @duction-valve to be opened. On such taking place the upper part of the dasher will be thrown over against the right side of the neck c and the dasher Will be moved toward the right eduction valve, expelling the Water that may be on the right of it (the said dasher) in the chamber I). Thus the operation will go on, and should we connect to one of the valves asuitable registering apparatus we may easily measure the HOW of Water taking place in any given time through the case A.

My apparatus is intended to be used as a fluid-meter or for such other purposes as it may be applicable to in the arts. ln some respects it resemblesa common forcepump made with a sectoral case and a vibrating dasher or piston, but in others it is essentially different therefrom. Vhile such force-pump generally has four valves, this has but two, and the operation of its dasher or piston is very different-from that ofthe force-pump. The ease also is differently made, as it is constructed of two chambers opening into one Aanother by a neck or passage Wide enough to allow the dasher to vibrate or play from one side to the other.

What I claim as my invention is- My improved automatic fiuidmeter as constructed and made to operate substantially as described-that is to say, of the following elements or their mechanical equivalentsin combination, viz: first, two chambers, ab, united by a rectangular or square neck or passage, c, made of a width greater than the thickness of the vibrating piston or plate extended through the neck; second, an induction pipe or 0pening, c, in the upper chamber; third,two educ- 1 tion-passages, 7c Z, and valves applied to the lower chamber; fourth, a vibrating plate, dasher, or piston,D,eXtending from one chamber, a, into another chamber, b, as described; fifth, a mechanism applied to the eductionvalves whereby they may be alternately opened and closed by the vibrating plate or dasher during its movement, as described.

In testimony whereoflhave hereunto set my signature this 23d day of June, A. D. 1854.. JOHN TAGGART. Tit-nesses:

R. H. EDDY, F. P. HALE, J r. 

